Got you

My money is on the big fella!
I don't know what it is but it was about 10mm in length and 2mm wide, I was trying to photograph a hoverfly the saw something looking like a twig moving and only when focused in with macro I realised what was going on, a tug of war. the little fella I think is a black fly so will give you a sense of scale.
Feeling a lot better now thanks for good wishes. Now I should be able to concentrate on editing wedding photos.